Color-shading wood.



i Umren .Sr/ir13SgT'PLLXTENFYTOFFICE?y f SAMUEL LYON, or lI'iAiviURe,nGERMANY.

srnerron'rronf'orming-part ofnetters Patent1in).700,348,datealn'ay20,1902. f 'f 'j "l f 1902. semina.'93.5657"ditspecimen.)

" @engendrantPantry11,

Be it known that I, SAMUEL LYON, a subject ofthe German Emperor,and aresidentof Hainburg, in the German Empire, have invented certain new anduseful Improvements in Color-Shading `llood, of which the following f vis a specification.

`This inventionrelates to impro vements in the .production ofcolor-shading ,upon Woodsurface, and is` more particularly applicable* ifor the production ofimitation ofwood-.graini fing' equal in-appearanceto thenatural grain f and with the vivacious naturalfplay of lines `andcolor-shading seen in the natural grain. Besides designs of wood-grainmy invention also enables other designsiwith variouscolorshadings to heproduced, and more especially l to the pyrographic decoration ot' Wood.

, The essential ypartof 4the invention relates to special arrangement ofthebottom orrimpression-surface of the diese-'that is to say, to themanner in Whichthe design to be produced is shapedor engraved on thedie. In the impression-surface of the die the'parts correspondin gtothelight tints,the half-tones,v

or graduated half-tones are recessed. Now

according to this invention the recesses in myz improved die, either allor some ofthem, are

made more or less deepthat is to,` say, of a" diiferent depth-and inaddition to which they may all or some of them have` unsymmetricaloutlines, while the parts in relief may be upon the same level ordisposed so as to be upon dierent levels. v l n n In order Vthat myinvention may be more' fully understood byone skilled'in the art towhich it appertains, I will now proceed to describe the same in detail,reference being had to the-accompanying drawings, whereon likebrand orembellishment has been applied thereto by means of the die a. Figs. 4,5, andv 6 are sectional views of several portions of the die. Theseviews are drawn' on a somewhat- Fig.4 2 is a vertical section Fig. 3 isa View of the( finished Wooden plate h as it appears after the largerscale'and illustrate the characteristic 'shapes or con tigurat'ionsofthe recesses or in-` 1 u n f taglio portionsA of the die."Fig.7'shows` a Wooden block w, from which the plates or ve-4 neers maybe cutin the manner indicatedfb'yf.' l

the dotted lines?n r; and Fig. Sis a sectionalAViewshowingamodifi'edformofmyimprovedk l 1 6o I d ie. ,l I When thelhot or heated die is pressed upon the woodenplategb, the vvparts ofthelatter vvhicha'reY in immediatecontact with the relief `parts a of thedie are, as usual, burned to-a deep black. The other parts of the Woodbeneath the recesses@2 are less burned and ing between the lighter andthe darker shades l alters" with the distance that the Walls `of the'recesses arev from the wood. If therecesses l are formed"inr asymmetricalmanner with slanting sidess, Fig. 401 s', Fig. 6, Suchas aninverted-V shape, it will be found thatthe light tints' on" the Woodbeneath the remotest part of such recess a2 -disappearsfor blendsgradually into the dark tints or charred po r' tions of the Woodvbeneath the two adjacent portions et in relief that contact with theWood.

If, however, the sides of the recesses are ir-V regular, withanlinclined side s2, Fig. v5, and

at or beneath the inclined side s2, While a more or less sharpdilerencewill be produced at or beneath the straight side's3, so thatthe charredVtintson the Wood at the latter part -stand out-more or less distinctlyfrom each f 9"( other, as is obvious from-the embellished plate b, Fig.3, without further explanation. `It

will thus be seenthatV the formation of the recesses and their sides isthe cause of a more f or less sha1p'or`gradnal transition or blend f n Vvtolshade,jand,further, thetint on themood 1 ing of the pyrographicdecoration from light will bethe lighter the deeper the recesses.

` In theV modification shown in Fig.=8lthe im; l

4proved die" is provided with relief portions a' Id3 a4, arrangedv ondifferent levels Jin" orderv to'prodiice different pyrographiceffects,the blending of Which is again controlled by thev distance of thesurface of the heated die from the Wood to be decorated.

Generally expressed, the im pression-su rface of the die affects thewood in such a manner that the carbonizing of the latter is effected bythose parts that come into contact with the Wood,and thus producesblack. Lighter shades (half-tones) of uniform tint are produced bysurfaces as parallel to Lthe contacting surfaces ct', the intensity ofthe tint or half-tone in any case being dependent upon the degree ofl1eat transmitted to the surface of the Wood beneath it, such degreebeing, in accordance with the welhknown lawof heat,in verselyproportional to the square of the distance of the heating-surface fromthe surface heated. A shallow recess in the die produces, therefore, acorrespondingly deeper tint, because the air in't is heated moreintensely than when the recess is deeper. In this manner different tintsmay be produced, the outlines of which may be caused to appear more orless sharp or definite or graduated and indistinct, according to thedescribed arrangement of the surfaces of the die. At the parts Where therecesses are so deep that the heat radiated therefrom does not affectthe Wood its natural color remains to produce l1ighlight.

It is an'espeeial advantage to have the Wood w cnt upon the cross-grain,as indicated in Fig. 7 by dotted lines r r. In this manner thelongitudinal fibers of the Wood are cut through and form fine channelsbetween the two surfaces of the plate b,through which the carbonizationadvances to the lower surface. Consequently the Wood thus marked withthe design, and which may, for instance, be a veneering-sheet glued toan ordinary deal-board, can be planed and scraped Without fear ofdestroying the design. A

Having thus described my invention, what I c'laim as new therein, anddesire to secure by Letters Patent, isf i l. The herein-described diefor pyrographic decoration in which parts are projected so as to contactwith the material suieiently to char parts of the design, and the partsof the die immediately adjacent to said charrng parts are arranged atangles that vary aecording as the surfaces bounding the charred portionsof the `contemplated design are intended to contrast or merge as tolight and shade with said charred portions, substantially as and for thepurpose set forth.

2. The herein-described die for pyrographic decoration in which partsare projected so as to contact With the material sufliciently to charparts of the design, the parts of the die immediately adjacent to saidcharring parts are arranged at angles that vary according as thesurfaces bounding the charred portions of the contemplated design areintended to contrast or to merge as to light and shade with such charredand such portions of the die as are intended to produce areas of uniformtint of any shade, being maintained at a uniform distance from thesurface acted upon, substantially as and for the purpose set forth.

SAMUEL LYON.

lVitnesses:

MAX KAEMPFF, E. II. L. MUMMENHOFF.

